If you were to abbreviate words into letters, e.g. Compact Discs or Detective Constables, would you use the possessive apostrophe, CD's and DC's or just use CDs and DCs? Ta Muchly.
I believe the official stance is that they should be there. But you ask what I do, and I can see no legitimate reason for them to be there confusing the situation, so it irks, and I do not add them. The change in letter case is indication enough.
This is one of my bugbears at work where I see apostrophes on capitalised acronyms and shortenings all the time eg PC's. Apostrophes should not be used with plural abbreviations.
However, apostrophes also indicate missing letters eg "it's" and somebody will say that there are lots of missing letters in "CD". However, I stand by my original answer....no apostrophe needed.
No apostrophe needed. An apostrophe does indicate something is omitted ( it's = it is ) but not in the case you mention. Abbreviations with an apostrophe would lose a mark in an examination. If an apostrophe is included in a plural word, it would lose marks too.
Trouble is - these days simplification of rules normally means 'there are now no rules'. It would be a shame to say goodbye to the apostrophe. Bit like 'Eats, shoots and leaves'.
It is a bugbear for those of us for whom language and punctuation are important - but increasingly, people seem to scatter apostophe's where ever there seem's to be a place for them, even if it isnt appropriate (!!!!!)
I have even seen signs on vans with apostrophes in wrong places - now that is scary!
The missing letter argument is nonsense, IMO. If "compact disc" is abbreviated to CD, then why isn't its plural form C'D's? There are more letters removed from "compact" than there are from "disc"!
I agree with the other posters who say no apostrophe's in plural's :-)